Yes, this is very bad news.

The Pentagon has confirmed that a new Russian nuclear delivery drone is real. The undersea drone, which carries an enormous nuclear warhead to destroy coastal cities and military bases, was actually tested late last month. If this can cause such a huge negative impact, then it is very bad news.

Yes, this is potentially bad for world peace.

The weapon described by the pentagon is several more times powerful than the ones used by the United States against Japan. Russia's development of this weapon could bring back the Cold War, and further erode relations between the United States and Russia. United States ports, as well as ports of other countries would have no defense against the drone.

Yes, Any sort of mass destructive weapon means eventual war

If a country has this type of intensive weapons then they are prepared for any type of war. It's understandable to be prepared but if you are prepared for war then you are expecting it. To have world peace we would need to abolish all weapons so if Russia has a submarine nuke then this automatically puts us a step back from world peace.

Yes, Russia obtaining a submarine nuke delivery drone is bad news for those who wish for world peace.

Yes, Russia obtaining a submarine nuke delivery drone is bad news for those who wish for world peace. This drone enables the deliver of highly destructive nuclear weapons through the use of unarmed submarines. For those who wish for world peace, this is terrible news because of the prospect of mass death that comes with this device.